- Protein chains are often arranged in a helix and the type of interaction that is responsible for holding the protein chain in this shape is hydrogen bonding.

What method can be used to separate a mixture of amino acids formed by the hydrolysis of a protein and how could the various amino acids could be identified?

Alright so, mixtures of amino acids can be separated by paper chromatography or thin-layer chromatography and to identify the range of amino acids you could compare them with known amino acids. ( the fact there are a limited number helps)

Alkenes undergo addition polymerisation, and when asked to draw the repeating unit just remember it's only two C-C atoms in a chain then the rest of the molecule, if it's big is basically, like, methyl bonds etc + remember to draw the trailing bonds. I cba to draw example structures bc it's pretty simple.

Reasons as to why polyalkenes are generally non- biodegradable:

-They are chemically inert.

- C-C chain is not easily split by biological entities such as enzymes.